DIGI-Golden Sabre

This is a VLF Metal Detector made entirely by myself, according to TGSL project on Geotech Forum. It has a very useful instrument called VDI. It can identify the kind of metal detected, showing a number correlated to specific metal conductivity (ID). This number goes from -90 (ferrous metals, iron), 0 (aluminium foil), +90 (high conductivity metals like silver).
The signal strenght is indicated by SS value.
VDI is a digital interface made with Arduino Nano and a specific software specially developed for the purpose.
Special thanks to Daren, Don Bowers, Silver Dollar, Davor, Qiaozhi, Ivconic, Silverdog, Eduardo, Golfnut and many others...